Band-saw guide



(No Model.)

H. D. FIELDS. BANDSAW GUIDE.

No. 411,241. Patented Sept. 17, 1889'.-

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UNITED STATES PATENT OEEICEO IIANNIBAL D. FIELDS, OF COLUMBUS, OI-IIO.

BAjND-SAW GUIDE.

SPECIFICATION forming part of Letters Patent No. 411,241, dated September 1'7, 1889.

Application iled 'ehruaryQ, 1889. Serial No. 299,351. (No model.)

To all whom t may concern:

Be it known that I, HANNIBAL D. FIELDS, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented a certain new and useful Improvement in Band-Saw Guides, of which the following' is a specification.

My invention relates to the improvement of guides or adj usters for band-saws.

The objects of my invention are to provide guide-blocks for band-saws so supported and arranged as to admit of the saw being held in proper cutting position; to provide for the uniform adjustment of the cutting portion of the saw by the operation of but one lever; to admit ot' the saw being adjusted for cutting in the desired direction while the same isrunning; to provide for the extension or shortening of the rods connecting said guides with the lever-shaft; to provide one of said guides with a frictional roller, again st which the rear edge of the saw may bear, and to so connect said roller and guide-block as to admit of the former being removed without the necessity ot taking the guide apart; to provide means for regulating the distance between said guide-blocks and the outer end of the columnarms which support them; to provide for the vertical adjustment of said blocks and their supporting-arms, and to provide said guideblocks with saw-bearing guide-strips adj ustable for use with saws of dili'erent widths. These objects I accomplish in the manner illustrated in the accompanying drawings, in which- Figure 1 is a view in perspective of my improved device. Fig. 2 is a face view of a portion of the frame-column, taken on line aus of Fig. 1. Fig. 3 is a sectional view of the turnbucklc connection of the guide-operating arms. Fig. l is a plan view of one of the guide-blocks. Fig. 5 is a view of the rear face of one of said guide-blocks. Fig. 6 is a sec'- tional view taken on line @j y of Fig. 5. Fig. Tis an end elevation of one of said guides, and Fig. 8 is a rear face View of one of the end plates of one of the guide-supporting provided on its outer face with a central vertical projection or cleat a, the latter having its vertical edges beveled inwardly in the form of a dovetail, as shown.

B represents two parallel arms made to project horizontally outward, one above the other, from that face of the column A having the vided with dovetailed grooves, through which passes loosely the correspondinglyshaped cleat c of the column A, thus supporting said arms B at right angles with said column. The outer end of each of these arms B is provided, as shown, with a fixed oblong plate I), of such length as to project outwardly a :short distance from the front face of said arms. This outwardly-projecting end of each of the plates his shaped to form, as shown, a dovetailed tongue b.

C represents the lower saw-guide block, consisting of two parallel plates c, having their inner faces supported a short distance apart and connected by transverse screwthreaded bolts c', the slotted heads of which are flush with the outer surface of the outer plate c. These bolts c are provided, as shown, between the plate c with nuts c2, made to bear, respectively, against the inner faces of said plates C. The inner plate c is provided at the center of its height and in rear of the center ol' its length with a horizontal slot D, the inner termination of which somewhat enlarged.

CL represents an approximately-square frame having the outer surface ol` its upper and lower sides beveled, and having extending transversely therethrough in its lower half and projecting outwardly therefrom a iixed half of a bearing-box d', the latter having a horizontal and central bearing-groove in its upper surface, as shown. A small frictional wheel e, pivotally mounted on the inner end of a short shaft e', being first introduced between the plates c through the enlarged end of the slot D, the frame d is then so held that 'one of the projecting ends of the half bearingbox CZ extends into the outer end of the slot D. The frame may then be moved against the face of the plate c until said inwardlyprojecting end of the half-box CZ" is within the enlarged inner end of the slot D and the cleat a, the rear ends of said arms being pro- IOO beveled upper and lower edges of the fra-me havebeen made to slide beneath the beveled overhanging edges of two short cleats d2, respectively secured above and below the eularged end of the slot D. The outer end of the shaft e having been made to bear in the groove of the lower half-box CZ', the loose upper half (Z3 is inserted wit-hin the frame and secured by screws or bolts f upon the fixed lower half of the box, thus providing a bearing for the shaft of the friction-wheel. Made to project outwardly from one side vof the frame CZ is a short arm f.

F represents an oblong plate detachably secured by screws or otherwise in a vertical position to the outer face of said inner plate c at a point near its rear end, said plate F having projecting outwardly therefrom in a position parallel with the arm f an arm g. These arms g and j" are provided with oppositely-located screw-holes, through which are made to pass and adj ust-ably connect said arms a screw g. i

H represents vertical saw-bearing strips, of which there are preferably two pairs, the strips of each pair being oppositely located and being supported, respectively, against the inner sides of the plates c by means of binding-strips 7l, one of which is secured to each of the upper sides or edges of the plates c by means of set-screws h and made to clamp the upper outwardly-bent ends of the strips H against the upper sides of the plates c.

Between lugs I, made to project from the outer side of the inner plate c of the guideblock, is pivoted a short block t', having formed on its rear side a dovetailed groove. Into this groove is made to fit and slide the tongue b of the outer end of the plate b, thus connecting the guide-block C with the arln B. Secured to the underside of the sliding block t is one end of a metallic strip k, which, extending downwardly and thence rearwardly to a point beneath the end plate b, is connected at its outer end with a short downwardly-projecting arm b2 on the under side of the plate b by a horizontal screw-threaded pin lc', said pin being made to engage with the internal screw-threads of oppositely-located screw-holes formed in said arms 7c and b2. The backward and forward movement of the block t" is limited by a slot j, formed therein, through which projects a pin or bolt j made to extend outwardly from the front end of the plate b.

Although the above-described guide-block is that connected with the lower supportingarm b, it will be observed from the drawings that the description of the said lower guideblock and its connection with the lower supporting-arm B is also applicable to the upper guide-block C and its connection with the upper arm B, except that the roller e and the means for inserting and supporting the same are omitted from the upper block.

Projecting outwardly from the column A at a pointnear its upper end and on that side corresponding to the side from whichvthe cleat a projects is a bracket L. Pivotally supported between this bracket L and the floor is a Vertical shaft Z, preferably square in cross-section, as shown. Loosely mounted on this shaft l is a short outwardly-projecting arm M, having its outer end slotted, as shown. This arm M is supported at a point slightly above the upper arm B by means of a short rod m, one end of which is secured to the upper side of the arm B at or near the inner end thereof.- The remaining end of the rod m is secured to a boss formed on the under side of the arm M, thus holding the arm M in connection with the upper arm B.

N N represent short rods, through which a connect-ion is formed between the shaft-arm M and the upper guide-block O. The rod N has one of its ends pivoted within the slotted end of the arm M, and has its remaining screwthreaded end entering one end of a larger internally-screw-threaded tube or turn-buckle n. The rod N has a similar connection with the remaining end of the turn-buckle and extends outward to the guide-block, having its outer end pivotally connected with the rear plate c thereof. p

M represents an arm corresponding with the arm M, and which is secured and connected with the lower arm B and lower guide C in the manner prescribed forsaid arm M, the same letters of reference being employed to indicate corresponding parts.

P represents a lever having one of its ends fixed on the shaft l at a point between the arms M. Loosely embracing this lever are the two parallel and notched arms of a lever stop-bar q, one end of which is secured to the side of the column A. The lever P is provided on one side with the usual form of a spring-actuated lever-locking rodl r, having a bolt s on one end adapted to rest within one of the notches of the bar q and to be withdrawn therefrom in the usual manner by pressure on the handle r. The lower supporting-arm B is preferably assured in its position against the cleat a by a set-screw a. While the upper arm B maybe similarly connected it is obvious that other means maybe employed for supporting the arms at the desired height.

The operation of t-he above-described device is as follows: The saw S,which is mounted upon pivoted wheels in the usual manner, is made to pass vertically downward, as shown, between the front or bearing portions of the guide-plates c, the guide-strips H being so set as to bear loosely against the at faces of said saw while the rear edge of the saw has a bearing against the frictinalv roller e, pivotally supported, as described, in the lower guide-block C. It will be observed that by loosening the nuts c2 of the screw-th readed bolts c and turning the latter the distance between the plates c may be increased or diminished to accommodate a thicker-or thinner saw-blade. The lateral adjustment of IOO IIO

the saw-guides may be effected by turning the screws 7c', which will operate through the arm lr, to force the grooved blockst' outward or inward upon the outer and thickened end of the end plates Z9, and by turning the turnbuckle couplings n of the rod N N to i11- crease or diminish the length of the connection between the shaft-arms and guide-blocks. As will be seen, the distance between the upper and lower guide-blocks may be regulated as desired by raising or lowering either or both of the arms B upon their support a. Vhen it is desired to change the angle at which the saw-blade stands, a uniform adj ustment thereof maybe had at the upper and lower guide-blocks by an outward or inward pressure upon the lever I), the latter being .fixed in its position by allowing the bolt s of the locking-rod r to drop into the desired notch of the bar q. This uniform adjustment is attained through the shaft l, arms M7 connected therewith, and the above-described connections between said arms M and guideblocks U. It will be observed that in raising and lowering` the arms B the arms M are carried upward with said arms B through the connection therewith of the rods m. In case it should become necessary to remove the bearing-wheel e it may be accomplished without the necessity of taking apart the lower guide by removing the screw g', disconnecting the upper halt' of the bearing-box cl3 and drawing the frame CZ outward from its bearing in the cleat d2, thus admitting of the roller e being drawn outward through the enlarged end of the slot D.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is

I. In a band-saw guide, the combination, with a supporting-ar1n B, projecting from a column, of the connected guide-block plates c, friction-roller e, pivoted between said plates, saw-bearing strips H, having their upper bent ends adj ustably clamped, as described, by strips h against the upper side of said plates c, the rear plate c being adj ustably connected, as described, with said arm B, substantially as and for the purpose set forth.

2. In a saw-guide, the combination, with the connected plates c, of the guide-block C, one of said plates c having a slot D, provided with an enlarged inner end, cleats (Z2 above and below said enlargement, and plate F, having outwardly-projecting arm g, said plate being detachably secured to said plate c of t-he frame CZ, having half-bearing box d and pro jecting arm f bearing-box cap (7.3, detachably secured on said half-bearing box and forming in connection therewith abearing for shaft e of wheel e, and screw g', connecting said arms g and f substantially as and for the purpose specified.

HANNIBAL D. FIELDS.

In presence of- BARTON GRIFFITH, C. C. SHEPHERD. 

